Positronium formed by recombination of positron-electron pairs in polymers.
Positronium formed by recombination of positron-electron pairs in polymers.
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DOI：
10.1103/physrevlett.96.228302
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发表时间：
2006-06
影响因子：
8.6
通讯作者：
Kiminori Sato;D. Shanai;Y. Hotani;Toshiaki Ougizawa;Kenji Ito;Koichi Hirata;Yoshinori Kobayashi
中科院分区：
文献类型：
--
作者：
Kiminori Sato;D. Shanai;Y. Hotani;Toshiaki Ougizawa;Kenji Ito;Koichi Hirata;Yoshinori Kobayashi
在非极性聚合物中，正电子（Ps）主要是由高能正电子的快速内反应形成的，但它的形成部分是由弱束缚的Mott-Wannier-like正电子对的重组贡献的，并且容易受到电场和正电子辐照引起的扰动。发现复合形成的para-Ps （p-Ps）的平均初始能量约为主要由快速胞内反应形成的普通p-Ps的一半左右。
In nonpolar polymers, positronium (Ps) is dominantly formed by fast intraspur reactions of the energetic positron, but its formation is partially contributed by recombination of weakly bound Mott-Wannier-like positron-electron pairs and is susceptible to electric field and positron irradiation induced perturbations. The average initial energy of para-Ps (p-Ps) formed by recombination is found to be about half the energy of ordinary p-Ps dominantly formed by the fast intraspur reactions.